blob: 5fbab6f1970613ad9fc4709824034cd615c01c00 [file] [log] [blame]
Ivo van Doorn95ea3622007-09-25 17:57:13 -07001/*
Ivo van Doorn7e613e12010-08-06 20:45:38 +02002 Copyright (C) 2010 Willow Garage <http://www.willowgarage.com>
3 Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com>
Ivo van Doorn95ea3622007-09-25 17:57:13 -07004 <http://rt2x00.serialmonkey.com>
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the
18 Free Software Foundation, Inc.,
19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 */
21
22/*
23 Module: rt2x00usb
24 Abstract: rt2x00 generic usb device routines.
25 */
26
Ivo van Doorn95ea3622007-09-25 17:57:13 -070027#include <linux/kernel.h>
28#include <linux/module.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090029#include <linux/slab.h>
Ivo van Doorn95ea3622007-09-25 17:57:13 -070030#include <linux/usb.h>
Adam Baker3d823462007-10-27 13:43:29 +020031#include <linux/bug.h>
Ivo van Doorn95ea3622007-09-25 17:57:13 -070032
33#include "rt2x00.h"
34#include "rt2x00usb.h"
35
36/*
37 * Interfacing with the HW.
38 */
Adam Baker0e14f6d2007-10-27 13:41:25 +020039int rt2x00usb_vendor_request(struct rt2x00_dev *rt2x00dev,
Ivo van Doorn95ea3622007-09-25 17:57:13 -070040 const u8 request, const u8 requesttype,
41 const u16 offset, const u16 value,
42 void *buffer, const u16 buffer_length,
Ivo van Doorne9136552007-09-25 20:54:20 +020043 const int timeout)
Ivo van Doorn95ea3622007-09-25 17:57:13 -070044{
Ivo van Doornc1d35df2008-06-16 19:57:11 +020045 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
Ivo van Doorn95ea3622007-09-25 17:57:13 -070046 int status;
47 unsigned int i;
48 unsigned int pipe =
49 (requesttype == USB_VENDOR_REQUEST_IN) ?
50 usb_rcvctrlpipe(usb_dev, 0) : usb_sndctrlpipe(usb_dev, 0);
51
Sean Cross66f84d62009-11-05 20:22:03 +010052 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
53 return -ENODEV;
Adam Baker3d823462007-10-27 13:43:29 +020054
Ivo van Doorn95ea3622007-09-25 17:57:13 -070055 for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
56 status = usb_control_msg(usb_dev, pipe, request, requesttype,
57 value, offset, buffer, buffer_length,
58 timeout);
59 if (status >= 0)
60 return 0;
61
62 /*
Ivo van Doorne9136552007-09-25 20:54:20 +020063 * Check for errors
Ivo van Doorn95ea3622007-09-25 17:57:13 -070064 * -ENODEV: Device has disappeared, no point continuing.
Ivo van Doorne9136552007-09-25 20:54:20 +020065 * All other errors: Try again.
Ivo van Doorn95ea3622007-09-25 17:57:13 -070066 */
Sean Cross66f84d62009-11-05 20:22:03 +010067 else if (status == -ENODEV) {
68 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
Ivo van Doorn95ea3622007-09-25 17:57:13 -070069 break;
Sean Cross66f84d62009-11-05 20:22:03 +010070 }
Ivo van Doorn95ea3622007-09-25 17:57:13 -070071 }
72
73 ERROR(rt2x00dev,
74 "Vendor Request 0x%02x failed for offset 0x%04x with error %d.\n",
75 request, offset, status);
76
77 return status;
78}
79EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request);
80
Adam Baker3d823462007-10-27 13:43:29 +020081int rt2x00usb_vendor_req_buff_lock(struct rt2x00_dev *rt2x00dev,
82 const u8 request, const u8 requesttype,
83 const u16 offset, void *buffer,
84 const u16 buffer_length, const int timeout)
Ivo van Doorn95ea3622007-09-25 17:57:13 -070085{
86 int status;
87
Ivo van Doorn8ff48a82008-11-09 23:40:46 +010088 BUG_ON(!mutex_is_locked(&rt2x00dev->csr_mutex));
Adam Baker3d823462007-10-27 13:43:29 +020089
Ivo van Doorn95ea3622007-09-25 17:57:13 -070090 /*
91 * Check for Cache availability.
92 */
Ivo van Doorn21795092008-02-10 22:49:13 +010093 if (unlikely(!rt2x00dev->csr.cache || buffer_length > CSR_CACHE_SIZE)) {
Ivo van Doorn95ea3622007-09-25 17:57:13 -070094 ERROR(rt2x00dev, "CSR cache not available.\n");
95 return -ENOMEM;
96 }
97
98 if (requesttype == USB_VENDOR_REQUEST_OUT)
Ivo van Doorn21795092008-02-10 22:49:13 +010099 memcpy(rt2x00dev->csr.cache, buffer, buffer_length);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700100
101 status = rt2x00usb_vendor_request(rt2x00dev, request, requesttype,
Ivo van Doorn21795092008-02-10 22:49:13 +0100102 offset, 0, rt2x00dev->csr.cache,
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700103 buffer_length, timeout);
104
105 if (!status && requesttype == USB_VENDOR_REQUEST_IN)
Ivo van Doorn21795092008-02-10 22:49:13 +0100106 memcpy(buffer, rt2x00dev->csr.cache, buffer_length);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700107
108 return status;
109}
Adam Baker3d823462007-10-27 13:43:29 +0200110EXPORT_SYMBOL_GPL(rt2x00usb_vendor_req_buff_lock);
111
112int rt2x00usb_vendor_request_buff(struct rt2x00_dev *rt2x00dev,
113 const u8 request, const u8 requesttype,
114 const u16 offset, void *buffer,
115 const u16 buffer_length, const int timeout)
116{
Iwo Merglered0dbee2008-07-19 16:16:54 +0200117 int status = 0;
118 unsigned char *tb;
119 u16 off, len, bsize;
120
Ivo van Doorn8ff48a82008-11-09 23:40:46 +0100121 mutex_lock(&rt2x00dev->csr_mutex);
Iwo Merglered0dbee2008-07-19 16:16:54 +0200122
Ivo van Doorn82f97b82008-08-02 01:31:09 -0700123 tb = (char *)buffer;
Iwo Merglered0dbee2008-07-19 16:16:54 +0200124 off = offset;
125 len = buffer_length;
126 while (len && !status) {
127 bsize = min_t(u16, CSR_CACHE_SIZE, len);
128 status = rt2x00usb_vendor_req_buff_lock(rt2x00dev, request,
129 requesttype, off, tb,
130 bsize, timeout);
131
132 tb += bsize;
133 len -= bsize;
134 off += bsize;
135 }
136
Ivo van Doorn8ff48a82008-11-09 23:40:46 +0100137 mutex_unlock(&rt2x00dev->csr_mutex);
Iwo Merglered0dbee2008-07-19 16:16:54 +0200138
139 return status;
140}
Gertjan van Wingerde96b61ba2010-06-03 10:51:51 +0200141EXPORT_SYMBOL_GPL(rt2x00usb_vendor_request_buff);
Iwo Merglered0dbee2008-07-19 16:16:54 +0200142
Ivo van Doorn0f829b12008-11-10 19:42:18 +0100143int rt2x00usb_regbusy_read(struct rt2x00_dev *rt2x00dev,
144 const unsigned int offset,
Bartlomiej Zolnierkiewiczf255b922009-11-04 18:35:18 +0100145 const struct rt2x00_field32 field,
Ivo van Doorn0f829b12008-11-10 19:42:18 +0100146 u32 *reg)
147{
148 unsigned int i;
149
Sean Cross66f84d62009-11-05 20:22:03 +0100150 if (!test_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags))
151 return -ENODEV;
152
Ivo van Doorn0f829b12008-11-10 19:42:18 +0100153 for (i = 0; i < REGISTER_BUSY_COUNT; i++) {
154 rt2x00usb_register_read_lock(rt2x00dev, offset, reg);
155 if (!rt2x00_get_field32(*reg, field))
156 return 1;
157 udelay(REGISTER_BUSY_DELAY);
158 }
159
160 ERROR(rt2x00dev, "Indirect register access failed: "
161 "offset=0x%.08x, value=0x%.08x\n", offset, *reg);
162 *reg = ~0;
163
164 return 0;
165}
166EXPORT_SYMBOL_GPL(rt2x00usb_regbusy_read);
167
Johannes Stezenbach0e0d39e2011-04-18 15:29:12 +0200168
169struct rt2x00_async_read_data {
170 __le32 reg;
171 struct usb_ctrlrequest cr;
172 struct rt2x00_dev *rt2x00dev;
173 void (*callback)(struct rt2x00_dev *,int,u32);
174};
175
176static void rt2x00usb_register_read_async_cb(struct urb *urb)
177{
178 struct rt2x00_async_read_data *rd = urb->context;
179 rd->callback(rd->rt2x00dev, urb->status, le32_to_cpu(rd->reg));
180 kfree(urb->context);
181}
182
183void rt2x00usb_register_read_async(struct rt2x00_dev *rt2x00dev,
184 const unsigned int offset,
185 void (*callback)(struct rt2x00_dev*,int,u32))
186{
187 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
188 struct urb *urb;
189 struct rt2x00_async_read_data *rd;
190
191 rd = kmalloc(sizeof(*rd), GFP_ATOMIC);
192 if (!rd)
193 return;
194
195 urb = usb_alloc_urb(0, GFP_ATOMIC);
196 if (!urb) {
197 kfree(rd);
198 return;
199 }
200
201 rd->rt2x00dev = rt2x00dev;
202 rd->callback = callback;
203 rd->cr.bRequestType = USB_VENDOR_REQUEST_IN;
204 rd->cr.bRequest = USB_MULTI_READ;
205 rd->cr.wValue = 0;
206 rd->cr.wIndex = cpu_to_le16(offset);
207 rd->cr.wLength = cpu_to_le16(sizeof(u32));
208
209 usb_fill_control_urb(urb, usb_dev, usb_rcvctrlpipe(usb_dev, 0),
210 (unsigned char *)(&rd->cr), &rd->reg, sizeof(rd->reg),
211 rt2x00usb_register_read_async_cb, rd);
212 if (usb_submit_urb(urb, GFP_ATOMIC) < 0)
213 kfree(rd);
214 usb_free_urb(urb);
215}
216EXPORT_SYMBOL_GPL(rt2x00usb_register_read_async);
217
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700218/*
219 * TX data handlers.
220 */
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200221static void rt2x00usb_work_txdone_entry(struct queue_entry *entry)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700222{
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700223 /*
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200224 * If the transfer to hardware succeeded, it does not mean the
Ivo van Doornfb55f4d12008-05-10 13:42:06 +0200225 * frame was send out correctly. It only means the frame
226 * was succesfully pushed to the hardware, we have no
227 * way to determine the transmission status right now.
228 * (Only indirectly by looking at the failed TX counters
229 * in the register).
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700230 */
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200231 if (test_bit(ENTRY_DATA_IO_FAILED, &entry->flags))
Ivo van Doorn3392bec2010-08-06 20:46:53 +0200232 rt2x00lib_txdone_noinfo(entry, TXDONE_FAILURE);
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200233 else
Ivo van Doorn3392bec2010-08-06 20:46:53 +0200234 rt2x00lib_txdone_noinfo(entry, TXDONE_UNKNOWN);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700235}
236
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200237static void rt2x00usb_work_txdone(struct work_struct *work)
238{
239 struct rt2x00_dev *rt2x00dev =
240 container_of(work, struct rt2x00_dev, txdone_work);
241 struct data_queue *queue;
242 struct queue_entry *entry;
243
244 tx_queue_for_each(rt2x00dev, queue) {
245 while (!rt2x00queue_empty(queue)) {
246 entry = rt2x00queue_get_entry(queue, Q_INDEX_DONE);
247
Ivo van Doorndba5dc12010-12-13 12:36:18 +0100248 if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
249 !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200250 break;
251
252 rt2x00usb_work_txdone_entry(entry);
253 }
254 }
255}
256
257static void rt2x00usb_interrupt_txdone(struct urb *urb)
258{
259 struct queue_entry *entry = (struct queue_entry *)urb->context;
260 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
261
Ivo van Doorna1d1eab2010-10-11 15:38:45 +0200262 if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200263 return;
264
Johannes Stezenbach0e0d39e2011-04-18 15:29:12 +0200265 if (rt2x00dev->ops->lib->tx_dma_done)
266 rt2x00dev->ops->lib->tx_dma_done(entry);
267
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200268 /*
Ivo van Doorn652a9dd2010-08-30 21:15:19 +0200269 * Report the frame as DMA done
270 */
271 rt2x00lib_dmadone(entry);
272
273 /*
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200274 * Check if the frame was correctly uploaded
275 */
276 if (urb->status)
Ivo van Doorna1d1eab2010-10-11 15:38:45 +0200277 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200278
279 /*
280 * Schedule the delayed work for reading the TX status
281 * from the device.
282 */
Ivo van Doorn0439f532011-01-30 13:24:05 +0100283 queue_work(rt2x00dev->workqueue, &rt2x00dev->txdone_work);
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200284}
285
Helmut Schaa10e11562011-04-18 15:27:43 +0200286static bool rt2x00usb_kick_tx_entry(struct queue_entry *entry, void* data)
Ivo van Doornf019d512008-06-06 22:47:39 +0200287{
Gertjan van Wingerdefe725692010-06-29 21:40:34 +0200288 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
289 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
Ivo van Doornf019d512008-06-06 22:47:39 +0200290 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
Gertjan van Wingerdefe725692010-06-29 21:40:34 +0200291 u32 length;
Johannes Stezenbachd7bb5f82010-12-13 12:32:49 +0100292 int status;
Ivo van Doornf019d512008-06-06 22:47:39 +0200293
Ivo van Doorndba5dc12010-12-13 12:36:18 +0100294 if (!test_and_clear_bit(ENTRY_DATA_PENDING, &entry->flags) ||
295 test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
Helmut Schaa10e11562011-04-18 15:27:43 +0200296 return true;
Gertjan van Wingerdefe725692010-06-29 21:40:34 +0200297
Ivo van Doornee1e7552010-08-23 19:54:02 +0200298 /*
299 * USB devices cannot blindly pass the skb->len as the
300 * length of the data to usb_fill_bulk_urb. Pass the skb
301 * to the driver to determine what the length should be.
302 */
303 length = rt2x00dev->ops->lib->get_tx_data_len(entry);
Gertjan van Wingerdefe725692010-06-29 21:40:34 +0200304
Ivo van Doornee1e7552010-08-23 19:54:02 +0200305 usb_fill_bulk_urb(entry_priv->urb, usb_dev,
306 usb_sndbulkpipe(usb_dev, entry->queue->usb_endpoint),
307 entry->skb->data, length,
308 rt2x00usb_interrupt_txdone, entry);
309
Johannes Stezenbachd7bb5f82010-12-13 12:32:49 +0100310 status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
311 if (status) {
312 if (status == -ENODEV)
313 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
Ivo van Doorna13c8f32010-10-11 15:39:48 +0200314 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
315 rt2x00lib_dmadone(entry);
316 }
Helmut Schaa10e11562011-04-18 15:27:43 +0200317
318 return false;
Ivo van Doornf019d512008-06-06 22:47:39 +0200319}
320
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700321/*
322 * RX data handlers.
323 */
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200324static void rt2x00usb_work_rxdone(struct work_struct *work)
325{
326 struct rt2x00_dev *rt2x00dev =
327 container_of(work, struct rt2x00_dev, rxdone_work);
328 struct queue_entry *entry;
329 struct skb_frame_desc *skbdesc;
330 u8 rxd[32];
331
332 while (!rt2x00queue_empty(rt2x00dev->rx)) {
333 entry = rt2x00queue_get_entry(rt2x00dev->rx, Q_INDEX_DONE);
334
Ivo van Doorndba5dc12010-12-13 12:36:18 +0100335 if (test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
336 !test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200337 break;
338
339 /*
340 * Fill in desc fields of the skb descriptor
341 */
342 skbdesc = get_skb_frame_desc(entry->skb);
343 skbdesc->desc = rxd;
344 skbdesc->desc_len = entry->queue->desc_size;
345
346 /*
347 * Send the frame to rt2x00lib for further processing.
348 */
Ivo van Doornfa695602010-10-11 15:37:25 +0200349 rt2x00lib_rxdone(entry);
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200350 }
351}
352
Ivo van Doorn181d6902008-02-05 16:42:23 -0500353static void rt2x00usb_interrupt_rxdone(struct urb *urb)
354{
355 struct queue_entry *entry = (struct queue_entry *)urb->context;
356 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
Ivo van Doorn181d6902008-02-05 16:42:23 -0500357
Ivo van Doorna1d1eab2010-10-11 15:38:45 +0200358 if (!test_and_clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
Ivo van Doorn181d6902008-02-05 16:42:23 -0500359 return;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700360
361 /*
Ivo van Doorn652a9dd2010-08-30 21:15:19 +0200362 * Report the frame as DMA done
363 */
364 rt2x00lib_dmadone(entry);
365
366 /*
Ivo van Doorn181d6902008-02-05 16:42:23 -0500367 * Check if the received data is simply too small
368 * to be actually valid, or if the urb is signaling
369 * a problem.
Ivo van Doorn08992f72008-01-24 01:56:25 -0800370 */
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200371 if (urb->actual_length < entry->queue->desc_size || urb->status)
Ivo van Doorna1d1eab2010-10-11 15:38:45 +0200372 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
Ivo van Doorn181d6902008-02-05 16:42:23 -0500373
374 /*
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200375 * Schedule the delayed work for reading the RX status
376 * from the device.
Ivo van Doorn181d6902008-02-05 16:42:23 -0500377 */
Ivo van Doorn0439f532011-01-30 13:24:05 +0100378 queue_work(rt2x00dev->workqueue, &rt2x00dev->rxdone_work);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700379}
380
Helmut Schaa10e11562011-04-18 15:27:43 +0200381static bool rt2x00usb_kick_rx_entry(struct queue_entry *entry, void* data)
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100382{
383 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
384 struct usb_device *usb_dev = to_usb_device_intf(rt2x00dev->dev);
385 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
386 int status;
387
Ivo van Doorndba5dc12010-12-13 12:36:18 +0100388 if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags) ||
389 test_bit(ENTRY_DATA_STATUS_PENDING, &entry->flags))
Helmut Schaa10e11562011-04-18 15:27:43 +0200390 return true;
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100391
Ivo van Doorn64e7d722010-12-13 12:36:00 +0100392 rt2x00lib_dmastart(entry);
393
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100394 usb_fill_bulk_urb(entry_priv->urb, usb_dev,
395 usb_rcvbulkpipe(usb_dev, entry->queue->usb_endpoint),
396 entry->skb->data, entry->skb->len,
397 rt2x00usb_interrupt_rxdone, entry);
398
399 status = usb_submit_urb(entry_priv->urb, GFP_ATOMIC);
400 if (status) {
401 if (status == -ENODEV)
402 clear_bit(DEVICE_STATE_PRESENT, &rt2x00dev->flags);
403 set_bit(ENTRY_DATA_IO_FAILED, &entry->flags);
404 rt2x00lib_dmadone(entry);
405 }
Helmut Schaa10e11562011-04-18 15:27:43 +0200406
407 return false;
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100408}
409
410void rt2x00usb_kick_queue(struct data_queue *queue)
411{
412 switch (queue->qid) {
Ivo van Doornf615e9a2010-12-13 12:36:38 +0100413 case QID_AC_VO:
414 case QID_AC_VI:
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100415 case QID_AC_BE:
416 case QID_AC_BK:
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100417 if (!rt2x00queue_empty(queue))
Helmut Schaa10e11562011-04-18 15:27:43 +0200418 rt2x00queue_for_each_entry(queue,
419 Q_INDEX_DONE,
420 Q_INDEX,
421 NULL,
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100422 rt2x00usb_kick_tx_entry);
423 break;
424 case QID_RX:
425 if (!rt2x00queue_full(queue))
Helmut Schaa10e11562011-04-18 15:27:43 +0200426 rt2x00queue_for_each_entry(queue,
427 Q_INDEX_DONE,
428 Q_INDEX,
429 NULL,
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100430 rt2x00usb_kick_rx_entry);
431 break;
432 default:
433 break;
434 }
435}
436EXPORT_SYMBOL_GPL(rt2x00usb_kick_queue);
437
Helmut Schaa10e11562011-04-18 15:27:43 +0200438static bool rt2x00usb_flush_entry(struct queue_entry *entry, void* data)
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100439{
440 struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev;
441 struct queue_entry_priv_usb *entry_priv = entry->priv_data;
442 struct queue_entry_priv_usb_bcn *bcn_priv = entry->priv_data;
443
444 if (!test_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags))
Helmut Schaa10e11562011-04-18 15:27:43 +0200445 return true;
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100446
447 usb_kill_urb(entry_priv->urb);
448
449 /*
450 * Kill guardian urb (if required by driver).
451 */
452 if ((entry->queue->qid == QID_BEACON) &&
Ivo van Doorn7dab73b2011-04-18 15:27:06 +0200453 (test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags)))
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100454 usb_kill_urb(bcn_priv->guardian_urb);
Helmut Schaa10e11562011-04-18 15:27:43 +0200455
456 return false;
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100457}
458
Ivo van Doorn5be65602010-12-13 12:35:40 +0100459void rt2x00usb_flush_queue(struct data_queue *queue)
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100460{
Ivo van Doorn5be65602010-12-13 12:35:40 +0100461 struct work_struct *completion;
462 unsigned int i;
463
Helmut Schaa10e11562011-04-18 15:27:43 +0200464 rt2x00queue_for_each_entry(queue, Q_INDEX_DONE, Q_INDEX, NULL,
Ivo van Doorn5be65602010-12-13 12:35:40 +0100465 rt2x00usb_flush_entry);
466
467 /*
468 * Obtain the queue completion handler
469 */
470 switch (queue->qid) {
Ivo van Doornf615e9a2010-12-13 12:36:38 +0100471 case QID_AC_VO:
472 case QID_AC_VI:
Ivo van Doorn5be65602010-12-13 12:35:40 +0100473 case QID_AC_BE:
474 case QID_AC_BK:
Ivo van Doorn5be65602010-12-13 12:35:40 +0100475 completion = &queue->rt2x00dev->txdone_work;
476 break;
477 case QID_RX:
478 completion = &queue->rt2x00dev->rxdone_work;
479 break;
480 default:
481 return;
482 }
483
484 for (i = 0; i < 20; i++) {
485 /*
486 * Check if the driver is already done, otherwise we
487 * have to sleep a little while to give the driver/hw
488 * the oppurtunity to complete interrupt process itself.
489 */
490 if (rt2x00queue_empty(queue))
491 break;
492
493 /*
494 * Schedule the completion handler manually, when this
495 * worker function runs, it should cleanup the queue.
496 */
Ivo van Doorn0439f532011-01-30 13:24:05 +0100497 queue_work(queue->rt2x00dev->workqueue, completion);
Ivo van Doorn5be65602010-12-13 12:35:40 +0100498
499 /*
500 * Wait for a little while to give the driver
501 * the oppurtunity to recover itself.
502 */
503 msleep(10);
504 }
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100505}
Ivo van Doorn5be65602010-12-13 12:35:40 +0100506EXPORT_SYMBOL_GPL(rt2x00usb_flush_queue);
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100507
508static void rt2x00usb_watchdog_tx_dma(struct data_queue *queue)
509{
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100510 WARNING(queue->rt2x00dev, "TX queue %d DMA timed out,"
511 " invoke forced forced reset\n", queue->qid);
512
Ivo van Doorn5be65602010-12-13 12:35:40 +0100513 rt2x00queue_flush_queue(queue, true);
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100514}
515
516static void rt2x00usb_watchdog_tx_status(struct data_queue *queue)
517{
518 WARNING(queue->rt2x00dev, "TX queue %d status timed out,"
519 " invoke forced tx handler\n", queue->qid);
520
Ivo van Doorn0439f532011-01-30 13:24:05 +0100521 queue_work(queue->rt2x00dev->workqueue, &queue->rt2x00dev->txdone_work);
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100522}
523
524void rt2x00usb_watchdog(struct rt2x00_dev *rt2x00dev)
525{
526 struct data_queue *queue;
527
528 tx_queue_for_each(rt2x00dev, queue) {
529 if (!rt2x00queue_empty(queue)) {
530 if (rt2x00queue_dma_timeout(queue))
531 rt2x00usb_watchdog_tx_dma(queue);
532 if (rt2x00queue_status_timeout(queue))
533 rt2x00usb_watchdog_tx_status(queue);
534 }
535 }
536}
537EXPORT_SYMBOL_GPL(rt2x00usb_watchdog);
538
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700539/*
540 * Radio handlers
541 */
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700542void rt2x00usb_disable_radio(struct rt2x00_dev *rt2x00dev)
543{
Ivo van Doornbd394a72008-04-21 19:01:58 +0200544 rt2x00usb_vendor_request_sw(rt2x00dev, USB_RX_CONTROL, 0, 0,
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700545 REGISTER_TIMEOUT);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700546}
547EXPORT_SYMBOL_GPL(rt2x00usb_disable_radio);
548
549/*
550 * Device initialization handlers.
551 */
Ivo van Doorn798b7ad2008-11-08 15:25:33 +0100552void rt2x00usb_clear_entry(struct queue_entry *entry)
Ivo van Doorn837e7f22008-01-06 23:41:45 +0100553{
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200554 entry->flags = 0;
555
Ivo van Doorn0b7fde52010-12-13 12:35:17 +0100556 if (entry->queue->qid == QID_RX)
Helmut Schaa10e11562011-04-18 15:27:43 +0200557 rt2x00usb_kick_rx_entry(entry, NULL);
Ivo van Doorn837e7f22008-01-06 23:41:45 +0100558}
Ivo van Doorn798b7ad2008-11-08 15:25:33 +0100559EXPORT_SYMBOL_GPL(rt2x00usb_clear_entry);
Ivo van Doorn837e7f22008-01-06 23:41:45 +0100560
Ivo van Doornf1ca2162008-11-13 23:07:33 +0100561static void rt2x00usb_assign_endpoint(struct data_queue *queue,
562 struct usb_endpoint_descriptor *ep_desc)
563{
564 struct usb_device *usb_dev = to_usb_device_intf(queue->rt2x00dev->dev);
565 int pipe;
566
567 queue->usb_endpoint = usb_endpoint_num(ep_desc);
568
569 if (queue->qid == QID_RX) {
570 pipe = usb_rcvbulkpipe(usb_dev, queue->usb_endpoint);
571 queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 0);
572 } else {
573 pipe = usb_sndbulkpipe(usb_dev, queue->usb_endpoint);
574 queue->usb_maxpacket = usb_maxpacket(usb_dev, pipe, 1);
575 }
576
577 if (!queue->usb_maxpacket)
578 queue->usb_maxpacket = 1;
579}
580
581static int rt2x00usb_find_endpoints(struct rt2x00_dev *rt2x00dev)
582{
583 struct usb_interface *intf = to_usb_interface(rt2x00dev->dev);
584 struct usb_host_interface *intf_desc = intf->cur_altsetting;
585 struct usb_endpoint_descriptor *ep_desc;
586 struct data_queue *queue = rt2x00dev->tx;
587 struct usb_endpoint_descriptor *tx_ep_desc = NULL;
588 unsigned int i;
589
590 /*
591 * Walk through all available endpoints to search for "bulk in"
592 * and "bulk out" endpoints. When we find such endpoints collect
593 * the information we need from the descriptor and assign it
594 * to the queue.
595 */
596 for (i = 0; i < intf_desc->desc.bNumEndpoints; i++) {
597 ep_desc = &intf_desc->endpoint[i].desc;
598
599 if (usb_endpoint_is_bulk_in(ep_desc)) {
600 rt2x00usb_assign_endpoint(rt2x00dev->rx, ep_desc);
Ivo van Doornd15cfc32008-12-20 11:00:23 +0100601 } else if (usb_endpoint_is_bulk_out(ep_desc) &&
602 (queue != queue_end(rt2x00dev))) {
Ivo van Doornf1ca2162008-11-13 23:07:33 +0100603 rt2x00usb_assign_endpoint(queue, ep_desc);
Ivo van Doornd15cfc32008-12-20 11:00:23 +0100604 queue = queue_next(queue);
Ivo van Doornf1ca2162008-11-13 23:07:33 +0100605
Ivo van Doornf1ca2162008-11-13 23:07:33 +0100606 tx_ep_desc = ep_desc;
607 }
608 }
609
610 /*
611 * At least 1 endpoint for RX and 1 endpoint for TX must be available.
612 */
613 if (!rt2x00dev->rx->usb_endpoint || !rt2x00dev->tx->usb_endpoint) {
614 ERROR(rt2x00dev, "Bulk-in/Bulk-out endpoints not found\n");
615 return -EPIPE;
616 }
617
618 /*
619 * It might be possible not all queues have a dedicated endpoint.
620 * Loop through all TX queues and copy the endpoint information
621 * which we have gathered from already assigned endpoints.
622 */
623 txall_queue_for_each(rt2x00dev, queue) {
624 if (!queue->usb_endpoint)
625 rt2x00usb_assign_endpoint(queue, tx_ep_desc);
626 }
627
628 return 0;
629}
630
Ivo van Doornfa695602010-10-11 15:37:25 +0200631static int rt2x00usb_alloc_entries(struct data_queue *queue)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700632{
Ivo van Doornfa695602010-10-11 15:37:25 +0200633 struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200634 struct queue_entry_priv_usb *entry_priv;
635 struct queue_entry_priv_usb_bcn *bcn_priv;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700636 unsigned int i;
637
Ivo van Doorn181d6902008-02-05 16:42:23 -0500638 for (i = 0; i < queue->limit; i++) {
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200639 entry_priv = queue->entries[i].priv_data;
640 entry_priv->urb = usb_alloc_urb(0, GFP_KERNEL);
641 if (!entry_priv->urb)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700642 return -ENOMEM;
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200643 }
Ivo van Doorn181d6902008-02-05 16:42:23 -0500644
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200645 /*
646 * If this is not the beacon queue or
647 * no guardian byte was required for the beacon,
648 * then we are done.
649 */
Ivo van Doornfa695602010-10-11 15:37:25 +0200650 if (queue->qid != QID_BEACON ||
Ivo van Doorn7dab73b2011-04-18 15:27:06 +0200651 !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200652 return 0;
Ivo van Doorn181d6902008-02-05 16:42:23 -0500653
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200654 for (i = 0; i < queue->limit; i++) {
655 bcn_priv = queue->entries[i].priv_data;
656 bcn_priv->guardian_urb = usb_alloc_urb(0, GFP_KERNEL);
657 if (!bcn_priv->guardian_urb)
658 return -ENOMEM;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700659 }
660
661 return 0;
662}
663
Ivo van Doornfa695602010-10-11 15:37:25 +0200664static void rt2x00usb_free_entries(struct data_queue *queue)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700665{
Ivo van Doornfa695602010-10-11 15:37:25 +0200666 struct rt2x00_dev *rt2x00dev = queue->rt2x00dev;
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200667 struct queue_entry_priv_usb *entry_priv;
668 struct queue_entry_priv_usb_bcn *bcn_priv;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700669 unsigned int i;
670
Ivo van Doorn181d6902008-02-05 16:42:23 -0500671 if (!queue->entries)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700672 return;
673
Ivo van Doorn181d6902008-02-05 16:42:23 -0500674 for (i = 0; i < queue->limit; i++) {
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200675 entry_priv = queue->entries[i].priv_data;
676 usb_kill_urb(entry_priv->urb);
677 usb_free_urb(entry_priv->urb);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700678 }
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200679
680 /*
681 * If this is not the beacon queue or
682 * no guardian byte was required for the beacon,
683 * then we are done.
684 */
Ivo van Doornfa695602010-10-11 15:37:25 +0200685 if (queue->qid != QID_BEACON ||
Ivo van Doorn7dab73b2011-04-18 15:27:06 +0200686 !test_bit(REQUIRE_BEACON_GUARD, &rt2x00dev->cap_flags))
Ivo van Doornb8be63f2008-05-10 13:46:03 +0200687 return;
688
689 for (i = 0; i < queue->limit; i++) {
690 bcn_priv = queue->entries[i].priv_data;
691 usb_kill_urb(bcn_priv->guardian_urb);
692 usb_free_urb(bcn_priv->guardian_urb);
693 }
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700694}
695
696int rt2x00usb_initialize(struct rt2x00_dev *rt2x00dev)
697{
Ivo van Doorn181d6902008-02-05 16:42:23 -0500698 struct data_queue *queue;
Gertjan van Wingerde30caa6e2008-06-16 19:56:08 +0200699 int status;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700700
701 /*
Ivo van Doornf1ca2162008-11-13 23:07:33 +0100702 * Find endpoints for each queue
703 */
704 status = rt2x00usb_find_endpoints(rt2x00dev);
705 if (status)
706 goto exit;
707
708 /*
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700709 * Allocate DMA
710 */
Ivo van Doorn181d6902008-02-05 16:42:23 -0500711 queue_for_each(rt2x00dev, queue) {
Ivo van Doornfa695602010-10-11 15:37:25 +0200712 status = rt2x00usb_alloc_entries(queue);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700713 if (status)
714 goto exit;
715 }
716
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700717 return 0;
718
719exit:
720 rt2x00usb_uninitialize(rt2x00dev);
721
722 return status;
723}
724EXPORT_SYMBOL_GPL(rt2x00usb_initialize);
725
726void rt2x00usb_uninitialize(struct rt2x00_dev *rt2x00dev)
727{
Ivo van Doorn181d6902008-02-05 16:42:23 -0500728 struct data_queue *queue;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700729
Ivo van Doorn181d6902008-02-05 16:42:23 -0500730 queue_for_each(rt2x00dev, queue)
Ivo van Doornfa695602010-10-11 15:37:25 +0200731 rt2x00usb_free_entries(queue);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700732}
733EXPORT_SYMBOL_GPL(rt2x00usb_uninitialize);
734
735/*
736 * USB driver handlers.
737 */
738static void rt2x00usb_free_reg(struct rt2x00_dev *rt2x00dev)
739{
740 kfree(rt2x00dev->rf);
741 rt2x00dev->rf = NULL;
742
743 kfree(rt2x00dev->eeprom);
744 rt2x00dev->eeprom = NULL;
745
Ivo van Doorn21795092008-02-10 22:49:13 +0100746 kfree(rt2x00dev->csr.cache);
747 rt2x00dev->csr.cache = NULL;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700748}
749
750static int rt2x00usb_alloc_reg(struct rt2x00_dev *rt2x00dev)
751{
Ivo van Doorn21795092008-02-10 22:49:13 +0100752 rt2x00dev->csr.cache = kzalloc(CSR_CACHE_SIZE, GFP_KERNEL);
753 if (!rt2x00dev->csr.cache)
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700754 goto exit;
755
756 rt2x00dev->eeprom = kzalloc(rt2x00dev->ops->eeprom_size, GFP_KERNEL);
757 if (!rt2x00dev->eeprom)
758 goto exit;
759
760 rt2x00dev->rf = kzalloc(rt2x00dev->ops->rf_size, GFP_KERNEL);
761 if (!rt2x00dev->rf)
762 goto exit;
763
764 return 0;
765
766exit:
767 ERROR_PROBE("Failed to allocate registers.\n");
768
769 rt2x00usb_free_reg(rt2x00dev);
770
771 return -ENOMEM;
772}
773
774int rt2x00usb_probe(struct usb_interface *usb_intf,
775 const struct usb_device_id *id)
776{
777 struct usb_device *usb_dev = interface_to_usbdev(usb_intf);
778 struct rt2x00_ops *ops = (struct rt2x00_ops *)id->driver_info;
779 struct ieee80211_hw *hw;
780 struct rt2x00_dev *rt2x00dev;
781 int retval;
782
783 usb_dev = usb_get_dev(usb_dev);
784
785 hw = ieee80211_alloc_hw(sizeof(struct rt2x00_dev), ops->hw);
786 if (!hw) {
787 ERROR_PROBE("Failed to allocate hardware.\n");
788 retval = -ENOMEM;
789 goto exit_put_device;
790 }
791
792 usb_set_intfdata(usb_intf, hw);
793
794 rt2x00dev = hw->priv;
Gertjan van Wingerde14a3bf82008-06-16 19:55:43 +0200795 rt2x00dev->dev = &usb_intf->dev;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700796 rt2x00dev->ops = ops;
797 rt2x00dev->hw = hw;
798
Gertjan van Wingerde2015d192009-11-08 12:30:14 +0100799 rt2x00_set_chip_intf(rt2x00dev, RT2X00_CHIP_INTF_USB);
800
Ivo van Doorn7e613e12010-08-06 20:45:38 +0200801 INIT_WORK(&rt2x00dev->rxdone_work, rt2x00usb_work_rxdone);
802 INIT_WORK(&rt2x00dev->txdone_work, rt2x00usb_work_txdone);
803
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700804 retval = rt2x00usb_alloc_reg(rt2x00dev);
805 if (retval)
806 goto exit_free_device;
807
808 retval = rt2x00lib_probe_dev(rt2x00dev);
809 if (retval)
810 goto exit_free_reg;
811
812 return 0;
813
814exit_free_reg:
815 rt2x00usb_free_reg(rt2x00dev);
816
817exit_free_device:
818 ieee80211_free_hw(hw);
819
820exit_put_device:
821 usb_put_dev(usb_dev);
822
823 usb_set_intfdata(usb_intf, NULL);
824
825 return retval;
826}
827EXPORT_SYMBOL_GPL(rt2x00usb_probe);
828
829void rt2x00usb_disconnect(struct usb_interface *usb_intf)
830{
831 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
832 struct rt2x00_dev *rt2x00dev = hw->priv;
833
834 /*
835 * Free all allocated data.
836 */
837 rt2x00lib_remove_dev(rt2x00dev);
838 rt2x00usb_free_reg(rt2x00dev);
839 ieee80211_free_hw(hw);
840
841 /*
842 * Free the USB device data.
843 */
844 usb_set_intfdata(usb_intf, NULL);
845 usb_put_dev(interface_to_usbdev(usb_intf));
846}
847EXPORT_SYMBOL_GPL(rt2x00usb_disconnect);
848
849#ifdef CONFIG_PM
850int rt2x00usb_suspend(struct usb_interface *usb_intf, pm_message_t state)
851{
852 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
853 struct rt2x00_dev *rt2x00dev = hw->priv;
854 int retval;
855
856 retval = rt2x00lib_suspend(rt2x00dev, state);
857 if (retval)
858 return retval;
859
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700860 /*
861 * Decrease usbdev refcount.
862 */
863 usb_put_dev(interface_to_usbdev(usb_intf));
864
865 return 0;
866}
867EXPORT_SYMBOL_GPL(rt2x00usb_suspend);
868
869int rt2x00usb_resume(struct usb_interface *usb_intf)
870{
871 struct ieee80211_hw *hw = usb_get_intfdata(usb_intf);
872 struct rt2x00_dev *rt2x00dev = hw->priv;
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700873
874 usb_get_dev(interface_to_usbdev(usb_intf));
875
Ivo van Doorn499a2142009-03-28 20:51:58 +0100876 return rt2x00lib_resume(rt2x00dev);
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700877}
878EXPORT_SYMBOL_GPL(rt2x00usb_resume);
879#endif /* CONFIG_PM */
880
881/*
Ivo van Doorn181d6902008-02-05 16:42:23 -0500882 * rt2x00usb module information.
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700883 */
884MODULE_AUTHOR(DRV_PROJECT);
885MODULE_VERSION(DRV_VERSION);
Ivo van Doorn181d6902008-02-05 16:42:23 -0500886MODULE_DESCRIPTION("rt2x00 usb library");
Ivo van Doorn95ea3622007-09-25 17:57:13 -0700887MODULE_LICENSE("GPL");